Start Free nasty fast cams

Free nasty fast cams

This keeps the fragile surface of the LCD safe from picking up any knocks or scrapes when you're carrying the camera around. 4: I've been comparing digital camera spec lists, but what's the difference between types of autofocus points, and how many do I really need?

At any equivalent or effective focal length, larger sensors will give you a smaller depth of field - the depth of apparent sharpness in a picture.

The individual AF point or points that you're using will normally illuminate in the viewfinder to give visual confirmation that it's locked on target, but this isn't always the case, as in the Pentax K-x.

Basic AF points work in either the horizontal or vertical plane and are unidirectional.

As a result, the full-frame sensor size is ideal for portraiture, where you want to use a wide aperture to blur the background and make main subjects stand out (to learn more, see Full frame DSLR: do you really need one? The flip side is that APS-C cameras can be more useful than full-frame models when you want a large depth of field.

If you're shooting landscapes and want to keep the foreground as well as the horizon in focus, for instance, this can be difficult on a full-frame camera unless you use extremely small lens apertures, which can mean slow shutter speeds (click here for more quick, but great, landscape photography tips).

An advantage of extra AF points is that it enables the camera to track moving subjects more precisely in continuous autofocus mode.

You can also use a single point that exactly matches a small object you want to focus on, so there's no need to recompose after focusing.

It's a real bonus when you're taking self-portraits with the camera on a tripod.